Try to frame your contention so that is strong, authoritative and convincing.
It should sound like the voice of someone well informed about the subject and confident about their answer.
Be creative with your research, looking in a variety of places.
If you have difficulty locating information, seek advice from your teacher or someone you trust.
Consult your teacher, a capable classmate or someone you trust.
Bear in mind too that once you start researching, your plan may change as you locate new information.
This will refresh or build your existing understanding of the topic and provide a basis for further questions or investigation.
Your research should take shape from here, guided by the essay question and your own planning.
Essays are commonly used for assessing and evaluating student progress in history.
History essays test a range of skills including historical understanding, interpretation and analysis, planning, research and writing.